Channel Master 7777
High-gain mast-mount UHF/VHF TV antenna preamp
Our take on the Channel Master 7777 by Crutchfield's Steve Kindig
The 7777 is part of Channel Master's high-performance Titan 2 series of mast-mounted preamps. It is an ultra-low-noise, ultra-high-gain design that can solve a number of reception problems, and is especially effective for long-range "deep-fringe" applications. Several Crutchfield customers have reported that they are receiving stations from 50+ miles away using the 7777 in combination with Channel Master's 4228HD antenna.
Two-piece mast-mounted preamps have an advantage over more typical one-piece in-line units because the amplifier module is mounted near the antenna itself, to eliminate amplification of any noise or interference in your coax cable. A preamp can improve reception whether the problem is weak signal strength at your antenna, or loss of signal quality due to a long cable run between your antenna and TV.
Installation is simple: run a length of RG-6 cable from your antenna to the 7777's amplifier module, and another RG-6 cable from the amp to the 7777's power supply. Power is provided to the amplifier via the RG-6 cable, so no other wiring is necessary, and the power supply can be placed indoors to avoid exposure to the elements. Finally, run a length of RG-6 from the power supply either directly to your TV, or to a video distribution hub.
- two-piece design with separate mast-mounted amplifier module and indoor power supply
- high-gain, low-noise operation for deep fringe reception
- compatible with both digital and analog TV signals
- amplifies VHF (channels 2-13) and UHF (channels 14-51) signals
- gain: 30 dB
- noise: typically less than 2 dB
- filtering for rejection of out-of-band signals
- switchable FM trap (allows FM reception)
- 75-ohm input and output
- built-in lightning and surge protection
- shielded die-cast aluminum housing
- 5"W x 2-1/4"H x 3-1/2"D
- warranty: 90 days
- Our 60-day money-back guarantee
- mast not included
- RG-6 cable is recommended
What's in the Box:
- CM-7777 Mast-mounted antenna preamplifier
- AC/DC adapter (APA1260315U indoor power supply)
- Power Inserter (PCT-MPI-1G)
- 6' Coaxial cable (with threaded "F" connectors on each end)
- Large waterproof weather boot (for connection at antenna)
- 2 Small waterproof weather boots (for connections at preamplifier)
- U-bolt Assembly (with 2 star-washers and 2 hex nuts attached)
- 1 Self-tapping screw (for mounting power inserter)
- Instruction sheet (Eng/Span/Fren)
- Technical support contact sheet
If you're going to invest the time and money to install a long range TV antenna on your roof, then by all means install this amplifier and it will definitely improve your signal!
John, Westport, MA
Channel Master 7777 Reviews
Average Customer Review(s):
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Overview: The Channel Master Titan 2 Model CM-7777 Mast Mounted Antenna Preamplifier provides amplification for HD and digital signals received by your antenna. Preamplifiers can also be used when distributing the antenna signal to multiple TVs, as splitters reduce the signal strength at each output. The preamplifier comes with an indoor power supply, which connects via coaxial cable.
Signal Gain: The CM-7777 is a high gain, low noise preamplifier to be used in weak signal areas to boost the antenna signal to a viewable strength. The preamplifier provides 30 dB of signal gain on both VHF and UHF bands, at frequencies between 54 MHz and 1002 MHz.
Warning: Because of the high gain output, the CM-7777 is recommended for applications where ALL broadcast towers are 80+ miles away. Just one high power signal or broadcaster in close proximity can cause over-amplification, which can result in the loss of reception. For 98% of consumer applications, the CM-7778 Medium Gain Preamplifier is recommended.
Switchable FM Trap: The amplifier has an FM trap to block FM signals to prevent them from interfering with the TV signal. If you wish to unblock the FM signals, you will need to remove the cover, held in place by 4 Phillips-head screws, and set the switch to "Out".
Case: The CM-7777 features a rugged, outdoor-rated housing that can withstand temperatures up to 140°F. The preamplifier mounts to the antenna mast with the supplied U-bolt assembly just below the antenna. The unit mounts with the connections facing downward to keep moisture out of the housing and the connections dry.
Note: The preamplifier and supplied U-bolt assembly are designed for use with antenna masts up to 1-3/4" in diameter.
Connections: The CM-7777 has two F-type 75-ohm connections at the preamplifier: a combined VHF/UHF input, and an output/power connection. The indoor power supply (AC adapter) connects via coaxial cable, and includes a power inserter to energize the mast-mounted amplifier along the cable.
- Width: 4.904"
- Height: 2.54" (without cables connected)
- Depth: 3.733"
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Why did you buy this?
Customer comments, good luck with previous products from Channel Master. I expect good service from Crutchfield and product company. [ Robert May 05, 2018 ]
It was exactly the booster I wanted and your company seemed very reputable [ Ronald L. Apr 03, 2018 ]
I did some research on the best TV antenna preamps and the channel master 7777 had good reviews although some, reviews complained about longevity. I am hoping if i have problems with it, they can be resolved easily. crutchfield seems to have good tech support [ Richard Mar 24, 2018 ]
From my research online, this looks like the best booster for my TV antenna. [ Rob Dec 23, 2017 ]
I have read that they work pretty good [ Douglas Nov 01, 2017 ]
Can't get all channels I want a friend bought this from you and I can get the channels I need because he does. [ Ryan Oct 03, 2017 ]
Used previously where high gain was necessary. Winegard LNA200 current model brought in 10 fewer stations. [ Peter Aug 02, 2017 ]
This one has the highest boost, metal case without going into the commercial style boosters. Hopefully it works well. [ Gerald Jul 12, 2017 ]
Options & price [ STEPHEN P Jun 01, 2017 ]
Cannot get channel 8 ABC from Dallas [ B May 04, 2017 ]
Recommended for distances over 50 miles [ John May 02, 2017 ]
I am 60 miles from my stations, without a signal booster I can not get any stations to come in. [ David Jan 27, 2017 ]
Range [ JEFFREY Jan 13, 2017 ]
I needed better reception for my tv and this was the way to go go. [ Brian Dec 01, 2016 ]
Best option to avoid line loss from antenna to TV! [ JOHN Sep 17, 2016 ]
Price and brand [ Charles Jul 25, 2016 ]
per feed back online [ Gary Jun 15, 2016 ]
Reviews say it is a very powerful unit which is what I need for my current reception and distance from antenna. [ Lyndon Apr 30, 2016 ]
The towers I am trying to receive from are 26 to 80 miles away .Our cabin is on top of a ridge and with trees, leaves and frequent fog I feel this is a good decision. Presently our HD channels are intermittent at best.The antenna is a grid type HD antenna that would be great for a city or an area with strong , close signals. Besides that I am trying to get a station north of me that carries the Phillies. Everyone I talked to say the Masterpiece 100 channel master will suit my needs also. [ Richard R. Mar 24, 2016 ]
recommended by crutchfield chat [ david Feb 17, 2016 ]
Trying to get a low power TV station that is 35 miles away (NBC) [ Kevin Dec 29, 2015 ]
3 questions already asked
No. The signals are different. [ JUAN Feb 15, 2016 ]
Unfortunatly no. The CM777 has an RF choke built in to reject frequency bands that are not in the TV spectrum to reduce spurious signals. [ Phillip Feb 15, 2016 ]
This amp is not designed for that [ AL Feb 15, 2016 ]
This amp is rated for 30db, however, it is also designed for deep fringe or very low signal. If you are in an area with decent signal I would recommend a 7778. I have found that the 7777 can be over-driven and or over drive the tv tuners very easily. [ AL Dec 22, 2015 ]
Unknown, though it did not work on a 40' exterior installation. [ LARRY May 21, 2014 ]
I have my antennas mounted on a pole on my back deck pointing in 2 different directions. I joined the two antenna signals together with a signal joiner then thru the amp and feed it to a splitter and onto two TV,s. I am located in a rural area, about 40 to 50 miles from several broadcast towers and I receive 28 to 30 stations. I even receive some new York city stations once in awhile and I live in northwestern C, which is about 100 miles away. without this amp I would only receive about 12 channels. I do think it will improve your reception from your attic, but the higher up your antenna is the better. There is a good website you maybe interested in, where you can punch in your location and receive a detailed report on what stations, distances, ect. you can expect to receive depending on several factors such as your location, the type of antenna and the height of your antenna. The Website is called TVFOOL and is loaded with all kinds of goodies. Between my antenna, streaming movies and tv programing, I cut the cord 2 years ago and do not miss my direct tv or their bills. I hope I was helpful to you and I wish you the best of luck. [ WILLIAM J May 18, 2014 ]
my antenna is on the roof it did improve my signal i would guess that if you are getting some signal in the attic that would boost your signal [ JOHN E May 17, 2014 ]
Thanks Bill ! [ Roger May 16, 2014 ]
It depends on your installation, but yes, this will work on an attic installation. I have one on my attic antenna to pick up the far away stations. Just make sure you have an outlet nearby to plug into for power. [ NICK May 16, 2014 ]
i'm 90 miles away, with out it i only get 1 station. with it i get 10 from time to time [ MITCH May 16, 2014 ]
I use the amp on a high gain UHF antenna in an attic. It definately pulls in stations that are about 60 miles away. I would have only one local channel otherwise. [ PAUL May 16, 2014 ]
We didn't put ours I the attic, but as I recall the instructions said it would help either way. Plus, the amplifier doesn't gather the signal. That is the antennas job and the amplifier just gives the antenna greater receiving power. I believe the 7777 works great. We went back to air last year but we used a Channel Master amplifier for years before all the cable nonsense and if you've never used an amplifier, you will be shocked at the improvement. We're 60 miles from Portland, ME and 75 miles from Boston. We watch 28 or 29 channels from these two areas without a hiccup. Bill [ WILLIAM May 16, 2014 ]
My antenna is not in my attic, it is in an upstairs bedroom, but it works great there. [ WILLIAM E May 16, 2014 ]
You are not going to like my answer. At the antenna signal amplifiers do not actually increase the signal. They increase the microvolts of the carrier signal AC voltage received thereby reducing the signal loss traveling from the antenna to the TV set, which would otherwise possibly be reduced of potential significance in both voltage and corresponding signal loss. The key to a good amplifier must include both a good dB boost and a low dB noise level. Presently the Winegard LNA-200 has a 1dB noise level and has in my application outperformed the Channel Master. Almost all TV channels have converted to UHF with the HDB8X or equivalent antennas from Digiwave being two fine choices. Best performance will be attained by mounting lowest part of the antenna outside 5 feet above the tallest part of the roof. [ DAVID G May 16, 2014 ]
yes [ GINTARAS May 16, 2014 ]